Abstract
This chapter presents an introduction of microchannel plate (MCP) intensifier for photon counting. The chapter describes the construction and manufacturing techniques required to produce an intensifier of the specification. A 40 mm dual microchannel plate intensifier has been developed for use in high-resolution, centroiding, photon-counting systems for astronomy. The device incorporates an S.20 photocathode using proximity focus to a dual, double-length microchannel plate stack in the chevron configuration. The resulting electron cloud is proximity-focused onto an aluminized P. 20 phosphor screen deposited on a fiber-optic window. The intensifier body is of metal and ceramic construction, metal rings providing the relevant electrode feedthroughs into the vacuum envelope for the microchannel plates, phosphor screen and tube getter. Two, double-length (length-to-diameter ratio of 80: 1), “long life” microchannel plates are used in the “chevron” configuration. An extremely compact, very high-gain, photon-counting image intensifier has been manufactured for use in high-resolution astronomical photoncounting systems.
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